摘要
利用火焰脉冲－微反装置考察了Ｃｕ－Ｍｎ－Ｃｅ－Ｏ和Ｃｕ－Ｍｎ－Ｃｅ－Ｐｄ－Ｏ两类催化剂的三效活性。结果表明Ｃｕ的加入有利于Ｃｕ－Ｍｎ－Ｃｅ－Ｏ的ＮＯｘ和ＣＯ的转化，而不利于Ｃｕ－Ｍｎ－Ｃｅ－ｐｄ－Ｏ的ＮＯｘ和ＨＣ的转化。ＸＲＤ分析结果表明在Ｃｕ－Ｍｎ－Ｃｅ－Ｏ中加入Ｐｄ，原来的ＣｕＭｎ＿２Ｏ＿３消失，生成新相ＭｎＡｌ＿２Ｏ＿４；ＴＰＲ分析结果表明Ｃｕ使Ｍｎ－Ｃｅ－Ｏ样品表面氧量增加，表面易于还原，而使Ｍｎ－Ｃｅ－ｐｄ－Ｏ样品表面难于还原。实验结果还表明Ｍｎ－Ｃｅ－ｐｄ－Ｏ催化剂的三效性能远远优于Ｃｕ－Ｍｎ－Ｃｅ－Ｏ催化剂。
The three-way performance of Cu-Mn-Ce-O and Cu-Mn-Ce-Pd-Ohave been examined in a pulse-flame-micro reactor.The xperimental results show thatthe addition of Cu into the Mn-Ce-O is favorable to the activities of NOx and CO conver-sion , and the addition of Cu into Mn-Ce-Pd-O inhibits the conversion of NOx and HC.XRD result showed that the addition of Pd into Cu-Mn-Ce-O causes CuMn_2O_4 phase todisappear and MnAl_2O_4 phase to form. TPR indicated that Cu may increase the surface oxy-gen content for the catalyst Mn-Ce-O,thus the surface can be reduced easily , and whilethe catalyst Mn-Ce-pd-O is not so. The activity of Mn-Ce-pd-O is found to be muchhigher than that of Cu-Mn-Ce-O.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1995年第2期156-161,共6页
Journal of Fuel Chemistry and Technology
关键词
氧化酮
氧化铈
氧化锰
铜
钯催化剂
性能
cupper oxide, cerium oxide, manganese oxide, palladium catalyst
